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Keywords:

  • TOF-SIMS;
  • C60;
  • laser postionization;
  • strong-field ionization;
  • SNMS;
  • photoionization

Implementation of a new high energy, IR laser source for secondary neutral mass spectrometry, is presented. It consists of an 800 nm, 40 fs, 10 mJ, 1 kHz laser pumping an optical parametric amplifier generating 1.2–2.6 µm tunable pulses. The wavelength and intensity dependence of photoionized sputtered indium clusters and gas-phase histamine are presented, exhibiting less nonadiabatic multielectron dynamics (decreased fragmentation) at longer wavelength. Future prospects for secondary neutral bioimaging experiments are explored with a model system consisting of a 400 mesh grid, vapor deposited with adenine, and fixed over indium foil. Copyright © 2012 John Wiley & Sons, Ltd.